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Polyester composite material with polyvinylidene fluoride fiber as nucleating agent and preparation method thereof

A polyester composite material, polyvinylidene fluoride technology, applied in the field of polymer material preparation, can solve the problems of crystallization nucleating agent reunion and uneven dispersion, poor dimensional stability, slow crystallization rate, etc., to overcome low production efficiency, Excellent stability and improved crystallization speed

Inactive Publication Date: 2015-09-23
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to some inherent defects, such as slow crystallization rate, insufficient toughness, poor dimensional stability after heating, etc., it is limited in engineering plastics or molded parts.
In addition, the traditional nucleating agents used for crystallization, such as nano-calcium carbonate, clay, etc., have the disadvantages of agglomeration and uneven dispersion of crystallization nucleating agents in the polymer in the blending melt modification method

Method used

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  • Polyester composite material with polyvinylidene fluoride fiber as nucleating agent and preparation method thereof
  • Polyester composite material with polyvinylidene fluoride fiber as nucleating agent and preparation method thereof
  • Polyester composite material with polyvinylidene fluoride fiber as nucleating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Dry the polyethylene adipate under vacuum at 40°C for 3 hours, and dry the polyvinylidene fluoride fiber under vacuum at 100°C for 3 hours;

[0024] 2) Mechanically blend 60% polyester and 40% polyvinylidene fluoride fibers, and put the mixed powder into a mold of a flat vulcanizer for molding;

[0025] 3) Pre-molding the preformed blank, raising the temperature to 90°C and keeping it for 60 minutes to form the molding material, and applying 10 5 Pa pressure applies shear stress to the melt, and then the temperature is lowered to 45°C by furnace cooling, and then the pressure is removed, so that polyethylene adipate is crystallized into a film, and the molded composite material together with the mold Take out together;

[0026] The tensile strength was tested on a tensile machine; the thermodynamic stability and crystallization speed were tested by a differential scanning calorimeter; the morphology and structure of the interface region of the sample was observed by...

Embodiment 2

[0028] 1) Dry polyethylene adipate under vacuum at 25°C for 8 hours, and dry polyvinylidene fluoride fibers under vacuum at 60°C for 8 hours;

[0029] 2) Mechanically blend 80% polyester and 20% polyvinylidene fluoride fibers, and put the mixed powder into a mold of a flat vulcanizer for molding;

[0030] 3) Pre-molding the pre-formed blank, raising the temperature to 85°C and keeping it for 30 minutes to form the molding material, and applying 10 5 Pa pressure applies shear stress to the melt, and then the temperature is lowered to 45°C by furnace cooling, and then the pressure is removed, so that polyethylene adipate is crystallized into a film, and the molded composite material together with the mold Take out together;

[0031] The composite material was spin-coated, and its tensile strength was tested on a tensile machine; its thermodynamic stability and crystallization speed were tested by a differential scanning calorimeter; the tensile strength of the polyester composi...

Embodiment 3

[0033] 1) Dry polyethylene adipate under vacuum at 32°C for 5 hours, and dry polyvinylidene fluoride fibers under vacuum at 80°C for 5 hours;

[0034] 2) Mechanically blend 70% polyester and 30% polyvinylidene fluoride fibers, and put the mixed powder into the mold of a flat vulcanizing machine for molding;

[0035] 3) Pre-molding the preformed blank, raising the temperature to 115°C and keeping it for 45 minutes to form the molding material, and applying 10 5 Pa pressure applies shear stress to the melt, and then the temperature is lowered to 45°C by furnace cooling, and then the pressure is removed, so that polyethylene adipate is crystallized into a film, and the molded composite material together with the mold Take out together;

[0036] The composite material is spin-coated, and its tensile strength is tested on a tensile machine; its thermodynamic stability and crystallization speed are tested by a differential scanning calorimeter; the tensile strength of the polyester...

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Abstract

The invention relates to a polyester composite material using polyvinylidene fluoride fibers as a nucleating agent, which comprises the following components in percentage by mass: 60-90% of polyester and 10-40% of polyvinylidene fluoride fiber. The preparation method comprises the following steps: 1) drying polyethylene glycol adipate at 25-40 DEG C in a vacuum for 3-8 hours, and drying the polyvinylidene fluoride fibers at 60-100 DEG C in a vacuum for 3-8 hours; 2) mechanically mixing 60-90% of polyester and 10-40% of polyvinylidene fluoride fibers, and putting the mixed powder into a flat vulcanizing machine mold to perform forming; and 3) premolding the preformed blank, heating to 80-135 DEG C, keeping for 30-60 minutes, forming the molded material, applying 105Pa shear stress to the melt by using a polymethyl siloxane board, carrying out furnace cooling to 45 DEG C, removing the pressure, taking out the molded composite material together with the mold, and cooling to room temperature to obtain the composite material. The technique is simple and easy to implement and easy for industrialization, and has the advantages of low cost and obvious economic value.

Description

Technical field [0001] The present invention is a high -molecular material preparation technology field, which is specific to the polyester composite material and its preparation methods with polyticonnide fiber as a nucleus. Background technique [0002] Polybonic acid ethylene glycol is a biodegradable polymer. With its excellent performance and low prices, it is widely used in the aspects of foam plastic products, industrial plastics and rubber products.However, due to some inherent defects, such as slow crystal rate, insufficient toughness, poor dimensional stability after heating, it has limited it in terms of engineering plastics or molding parts.In addition, the traditional nuclear agent for crystals such as nano -carbonate, clay, etc., the disadvantages of gathered and dispersion in the polymers in the co -melting melting and melting modification method. Invention content [0003] In order to overcome the deficiencies of the above existing technologies, the purpose of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L27/16B29C43/58
Inventor 王海军冯会平李金祥王学川秦媛媛屈锋
Owner SHAANXI UNIV OF SCI & TECH
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